Is there a requirement that the pump must have stop buttons both at the local panel and on the DCS?
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Is there a requirement that all moving equipment (including pumps) must be equipped with stop buttons both on the DCS and at the local panel? Is it needed?
This post was last edited by liuei on 2010-4-12 at 10:42. A safety button (or switch, pull cord) of the forced cut-off type (the circuit is definitely interrupted when the button is pressed) must be installed at the machine site to ensure that the equipment can be stopped in case of an accident. It depends on the requirements of the process engineers to decide whether to set it to no on the DCS! Large-scale equipment does not have a built-in DCS startup function; it must be started on-site.
It would be best to have control switches both on-site and on the DCS. Normally, the DCS is used to control startup, but in case of an emergency or special situation, it is necessary to shut down the system on-site; therefore, on-site control switches are essential
Important pump stop buttons should be available on the SIS and at the site. Of course, the most important thing is to consider the process requirements
They should all be available; the DCS control room has functions for starting and stopping. There are also start and stop buttons on site. If on-site control is needed, then use on-site control
It is best not to install pump start buttons on the DCS; otherwise, operators will mostly refrain from starting the pumps in person. Stop buttons should be reserved for emergency shutdown of critical pumps only.
There can be no start control at the site; an emergency stop button must be installed；
Here, the key unit equipment comes with both remote and local control; for the less critical equipment, operation can be initiated locally, and it can also be started remotely, but it cannot be stopped remotely. But it has state feedback as well